Nowadays, much attention is paid to the leaders of political groups because they determine the direction of a political group and create government policy. The media also play an important role in the portrayal of leading politicians and their activities. The responsibility that political leaders bear is multidimensional, including issues related to their mandate as MPs. This article analyses the work of MPs who simultaneously headed political groups represented in the Sejm of the 8th term. The research may serve as a basis for a broader discussion on the role of group leaders in parliament.